title: Photoinduced solid state conversion of a radical σ-dimer to a π-radical pair.
abstract: Irradiation in the solid state of the hypervalent 4c-6e S···S-S···S bridged σ-dimer of a bisdithiazolyl radical leads to its photodissociation into a pair of π-radicals. The transformation has been monitored by optical spectroscopy, single crystal X-ray diffraction, and magnetic susceptibility measurements. As a result of the large electronic reorganization involved in the dimer-to-radical interconversion, the photogenerated S = 1/2 radical state is remarkably thermally stable, persisting to 242 K before reverting to the S = 0 dimer.
authors.affiliation: Department of Chemistry and Biochemistry, Florida State University , Tallahassee, Florida 32306, United States.
authors.forename: Hoa
authors.initials: H
authors.lastname: Phan
authors.forename: Kristina
authors.initials: K
authors.lastname: Lekin
authors.forename: Stephen M
authors.initials: SM
authors.lastname: Winter
authors.forename: Richard T
authors.initials: RT
authors.lastname: Oakley
authors.forename: Michael
authors.initials: M
authors.lastname: Shatruk